It's Obviously a Sex Change, but You're Telling Me That I'm a Replacement?

[Transformation + Adventure + No CP + Suspense + Slow Darkening + Slow Heat + Contrast Cuteness] This book is also called "A Beautiful Girl Reborn, She Will Never Become a Brave Replacement" Asuna's perspective: I'm tall, handsome, and a born warrior. From other people's perspective: A cute little lolita who always claims that she is a brave person all day long In the world after the disaster, who can not be betrayed, but when it was really his turn, Asta still couldn't accept it. As a brave man, Asta woke up and found that his most trusted companion was about to throw him into the crater of a volcano. After desperately escaping, she discovered that she had become a delicate and beautiful girl. Asta relied on her past knowledge and agility to survive, and even became the slave of a low-level monster for a time. This was an unimaginable shame and humiliation for her! But at this time, he met a girl named Yafei, and her identity was a phantom thief. The two began a journey of cooperation with each other. As the adventure continued, Asta's identity was gradually revealed, but it also brought more mysteries...